Abstract
Investigation of the Impact of Hot Forming the Properties of Seamless Steel Bottles for Liquefied Gases
Highlights
34 CrMo4 steel is construction steel used in many applications due to its favourable balance of strength, toughness and wear resistance in extreme working conditions
Plastic material flow curves were taken from tensile tests on samples which were made from tubes and finished bottles
Kučera [4] revealed that the most favourable and balanced mechanical properties as well as grain size were achieved by quenching and tempering treatments applied after the hot forming
Summary
34 CrMo4 steel is construction steel used in many applications (automotive and aircraft components such as crankshafts, axle arbors, tyres, forgings, wind turbines, mining equipment) due to its favourable balance of strength, toughness and wear resistance in extreme working conditions. 34 CrMo4 steel achieves the best mechanical properties after proper heat treatment, many researchers have investigated influence of cooling rate on microstructure and properties. Kučera [4] revealed that the most favourable and balanced mechanical properties (tensile strength, notch toughness and elongation) as well as grain size were achieved by quenching and tempering treatments applied after the hot forming. Investigation of different heat treatment modes determined that the best result in terms of the best ratio of tensile properties vs balanced and high notch toughness is achieved by controlled cooling process and tempering at 470.°C/air [1]. Sajadi et al [3] examined the impact that hot deformation parameters (temperature and strain rate) have on processes of dynamic restoration of 34CrMo4 steel. Deformation hardening intensity is estimated through comparison of calculated values of tensile strength and yield strength while tendency towards brittle fracture is evaluated through ratio of total elongation and elongation at maximum load
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